Steam boiler



Patented Dec. 17, 1929 UNITED STATES PATENT OFFICE CARL T. CARLSON, OF ERIE, PENNSYLVANIA, ASSIGNOR TO ERIE CITY IRON WORKS, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA STEAM BOILER Application filed June 15, 1925. Serial No, 37,142.

This invention is designed to improve boiler construction in the formation of a steam chamber for receiving the steam from the boiler. In carrying out the invention the steam chamber is preferably formed within one of the drums of the boiler and the invention also contemplates draining this steam chamber by a pipe leading from the steam chamber into one of the circulating pipes of the boiler so as to receive the ejector effect of the circulating fluid on the end of the drainage pipe. Other features and details of the invention will appear from the specification and claims.

Fig. 1 shows a vertical central section through the boiler on the line 1-1 in Fig. 2. Fig. 2 a section on the line 22 in Fig. 1.

Fig. 3 an enlarged plan view of a portion of the lower plate of the chamber.

Fig. 4 an enlarged section of the drainage chamber on the line 11 in Fig. 2.

1 marks the front drum of the boiler, 2 the lower drum, and 3 the rear drum, the front and rear drum being in the plane of the water level. Afront bank of tubes 4 connect the lower and front drum. An upper bank of water tubes 5 connect the front drum and the rear drum. A rear bank of tubes 6 connect k of tubes,

tion is upwardly in the front ban from front to rear in the upper bank of water tubes and downwardly in the rear bank of tubes. Steam pipes 7 connect the front drum with the rear drum and a bank of steam discharge tubes 8 connect the rear drum with a steam chamber 9 in the front drum. The steam chamber is connected by a pipe 10 with a manifold 11 of a superheater 12. The opposite ends of the coils of the superheater are connected with a manifold 13. f

The furnace is surroundedby a wall 14 and a top wall 15. A combustion chamber 16 is arranged in front of the front bank of tubes and between the front wall and a baffie 17 in the front bank of tubes. A bafiie 18 leads from the baffie 17 below the upper drum and a bafiie 19 leads from the baffle 18 through the bank of tubes 5. A baffle 20 is arranged below the rear drum and bafiie 18 and causes a return flow of gases to the rear portion of the front bank of tubes. A bafiie 21 extends from the baffle 20 along the rear of the front bank of tubes terminating above the lower drum and a baffle 23 extends from the upper drum along the front of the rear bank of tubes terminating above the lower drum. The gases are discharged through an opening 24. The gases pass from the combustion chamber, across the front bank of tubes, across the upper bank, sweeping the steam tubes, returning past the upper bank of tubes into the rear of the front bank of tubes and then into the rear bank of tubes and out the opening.

A drainage tube 25 leads from the chamber 9, the end of this tube extending into one of the tubes of the upper bank of steaming tubes 5, the discharge being in the direction of circulation through the tube so as to subject the drainage tube to the ejector effect of the circulating water.

The upper chamber is formed by a plate 26 which is secured to the upper portion of the shell of the drum and is provided with a manhole cover 26 and hand holes 27. The hand holes are preferably of sufficient length to include two of the tubes 8 and being arranged at opposite ends of said tube afford (W/C655 i0 U16 tIlClS 01. said tube for repair and cleaning. These hand holes are covere y hand hole covers 28 secured by bolts 29 extending to arches 30.

What I claim as new is In a steam boiler, the combination of a front drum; a rear drum; an upper bank of steaming water tubes connecting said drums; a lower circulating system connecting said drums; a steam chamber in the upper part of the front drum; steam tubes leading from the rear drum to said steam chamber; and a drainage pipe leading from the steam chamber into said upper bank of tubes and discharging in a direction to be subj eoted to the ejector effect of the circulation.

In testimony whereof I have hereunto set my hand.

CARL T. GARLSON.

Dec. 17, 1929. c, CARLSON 1,739,502

STEAM BOILER Filed June 15,- 1925 2 Sheets-Sheet 2 I28 0 b b b l 130 I la I 1 O I I I :0 0 o .5 r' o FIG-3. I l o 'L Q Q Q J O Patented Dec. 17, 1929 CARL T. CARLSON, OF ERIE, PENNSYLVANIA, ASSIGN OF ERIE, PENNSYLVANIA, A CORP STEAM BOILER OR TO ERIE CITY IRON WORKS,

ORATION OF PENNSYLVANIA Application filed June 15, 1925. Serial No, 37,142.

This invention is designed to improve boiler construction in the formation of a steam chamber for receiving the steam from the boiler. In carrying out the invention the steam chamber is preferably formed within one of the drums of the boiler and the invention also contemplates draining this steam chamber by a pipe leading from the steam chamber into one of the circulating pipes of the boiler so as to receive the ejector effect of the circulating fluid on the end of the drainage pipe. Other features and details of the invention will appear from the specification and claims.

Fig. 1 shows a vertical central section through the boiler on the line 11 in Fig. 2. Fig. 2 a section on the line 2-2 in Fig. 1.

Fig. 3 an enlarged plan view of a portion of the lower plate of the chamber.

Fig. 4 an enlarged section of the drainage chamber on the line 11 in Fig. 2.

1 marks the front drum of the boiler, 2 the lower drum, and 3 the rear drum, the front and rear drum being in the plane of the water level. A front bank of tubes 4 connect the lower and front drum. An upper bank of water tubes 5 connect the front drum and the rear drum. A rear bank of tubes 6 connect the rear drum and lower drum. The circulation is upwardly in the front bank of tubes, from front to rear in theupper bank of water tubes and downwardly in the rear bank of tubes. Steam pipes 7 connect the front drum with the rear drum and a bank of steam discharge tubes 8 connect the rear drum with a steam chamber 9 in the front drum. The steam chamber is connectedby a pipe 10 with a manifold 11 of a superheater 12. The opposite ends of the coils of the superheater are connected with a manifold 13.

The furnace is surrounded by a wall 14 and a top wall 15. A combustion chamber 16 is arranged in front of the front bank of tubes and between the front wall and a baffie 17 in the front bank of tubes. A baffle 18 leads from the baffle 17 below the upper drum and a baffle 19 leads from the baffle 18 through the bank of tubes 5. A baflie 20 is arranged below the rear drum and baflie 18 and causes a return flow of gases to the rear portion of the front bank of tubes. A baflle 21 extends from the bafile 20 along the rear of the front bank of tubes terminating above the lower drum and a baflie 23 extends from the upper drum along the front of the rear bank of tubes terminating above the lower drum. The gases are discharged through an opening 24. The gases pass from the combustion chamber, across the front bank of tubes, across the upper bank, sweeping the steam tubes, returning past the upper bank of tubes into the rear of the front bank of tubes and then into the rear bank of tubes and out the opening.

A drainage tube 25 leads from the chamber 9, the end of this tube extending into one of the tubes of the upper bank of steaming tubes 5, the discharge being in the direct-ion of circulation through the tube so as to subject the drainage tube to the ejector effect of the circulating water.

The upper chamber is formed by a plate 26 which is secured to the upper portion of the shell of the drum and is provided with a manhole cover 26 and hand holes 27 The hand holes are preferably of sufficient length to include two of the tubes 8 and being arranged at opposite ends of said tube afi'ord access to the ends of said tube for repair and cleaning. These hand holes are covered by hand hole covers 28 secured by bolts 29 extending to arches 30.

What I claim as new is In a steam boiler, the combination of a front drum; a rear drum; an upper bank of steaming water tubes connecting said drums; a lower circulating system connecting said drums; a steam chamber in the upper part of the front drum; steam tubes leading from the rear drum to said steam chamber; and a drainage pipe leading from the steam chamber into said upper bank of tubes and discharging in a direction to be subjected to the ejector effect of the circulation.

In testimony whereof I have hereunto set my hand.

CARL T. CARLSON. 

